Every now and then, the why is useful information that sheds needed light. Most of the time however, it's just unnecessary information taking up valuable space.
Like this example.
>this widget's green is blue-ish because it's designed to match the colours in the nth-generation photocopied manual, which at some point was copied on a machine that had low magenta
I'm sorry but unless matching the manual is a company mandate, this is not necessary at all to know and is wasted space.
Knowing the "low magenta" bit is especially useless information, company mandate or not.
>nor that it's essential that the green remains blue-ish, because lime and moss are different categories added in a different part of the system.
Now this is actual useful information. But it's also Information GPT can Intuit if the code that defines these separate categories are part of the context.
Even if it's not and you need to add it yourself (assuming you are even aware yourself. Not every human writing documentation is aware of every moving part) then you've still saved a lot of valuable time by passing it through 4 first and then adding anything else.